American Voters: Would you like to join a series of intelligent, illuminating political discussions with Gail Collins and Frank Bruni of The New York Times when they are at the political conventions in a few weeks? You can participate from home. If you're interested, raise your hand by Friday. All the details are below.

Attention N.B.A. and Olympics fans: Tomorrow, Wednesday, July 11 at 6 p.m. Eastern time, we are collaborating with Google to host a special G+ Hangout right here with +Carmelo Anthony and +Chris Paul of the New York Knicks and the Los Angeles Clippers, respectively. Mr. Anthony and Mr. Paul will join us from Las Vegas, where they're training for the 2012 U.S. Olympics basketball team. Do you have questions for them about their road to the games in London or their careers in general? Please post them below or share them with the hashtag #London2012Hangout; selected questions will be answered during the Hangout. You can add this event to your calendar here: http://bit.ly/Mjb6Zv

+The Gregory Brothers, known for their hilarious YouTube music-video mash-ups, in which they make songs out of non-songs and unintentional singers out of intentional speakers, submitted this Op-Doc video to The Times. You'll notice it's hard not to groove along.

We're looking forward to inviting you to participate in a live G+ Video Hangout this month to talk about human rights and foreign affairs with Susan Rice, the U.S. Ambassador to the United Nations, and +Nicholas Kristof of The Times. Learn more in the blog post below about this Hangout and a series of other G+/New York Times video conversations we're planning for our Opinion department.

Join Our Kentucky Derby Hangout This Thursday: With the Derby just around the corner, and the horse racing industry a topic of heated debate lately, we invite you to join our Google + video hangout to discuss horse racing and the Derby with our Joe Drape, a Times reporter who is an expert on horse racing. He is currently working on a powerful series on the topic (http://nyti.ms/IgTdXs). Mr. Drape and Jay Schreiber, a Sports editor at The Times, will take your questions and join you in a discussion on Thursday May 3rd at 3 p.m EDT. If you’re interested in joining, you’ll need to be available for 40 minutes beginning a little before 3 and have and have a video camera-enabled computer. Please let us know that you’re interested by commenting below and telling us a bit about your thoughts on the Derby or horse racing in general. Please also add the New York Times to one of your circles so we can add you to the hangout. We will your confirm your participation by replying below.

We had so much fun during our N.F.L draft video hangout last week that we're hosting another one on Monday, April 30 at 12 p.m. Eastern Time! It will last about 30 minutes. If you are available at that time and would like to participate in a G+ video hangout with New York Times football reporters Judy Battista and Mike Tanier, please R.S.V.P. in the comments below. Judy and Mike will take stock of the draft selections and will be eager to hear your comments and questions about the football season ahead. We will confirm your spot and participation by Monday morning.

We're thrilled to announce that, as of today, The Times has implemented a G+ share button on all articles on nytimes.com. Many of you have awaited this change over the past several months and we hope you'll begin using our new G+ button right away to easily share New York Times journalism with others. Without further ado, we share with you this fascinating story about a report published today on the origin of polar bears.

Baseball Fans: The start of the 2012 season is nearly upon us and three New York Times reporters who cover professional baseball — Tyler Kepner, David Waldstein and Andrew Keh — will preview it with you during a 30-minute Google+ video hangout on Monday, April 2, at 11:30 a.m. Eastern Time. If you'd like to join them to talk all things baseball in Monday's hangout, please R.S.V.P. in the comments below and tell us a bit about what kind of baseball fan you are. We'll confirm your participation on Sunday evening. A few more details are here: http://nyti.ms/HiScTz We hope to see you on Monday! We have seven spots available.

Casting Call for N.C.A.A. Basketball Fans: +Pete Thamel, +Greg Bishop and +Connor Ennis from The Times's Sports desk will be hosting a Google+ video hangout on Thursday at 3:30 p.m. ET. There are 7 spots left in the hangout for anyone who wants to join to talk with them about the first weekend of the N.C.A.A. tournament and look ahead to this week’s games. If you are free for 30 minutes at that time and would like to participate, please R.S.V.P. in the comments below and tell us a little bit about what kind of college basketball fan you are. We will select 7 of you and invite you to our hangout. We look forward to it!